The Wall in the Middle of the Book

There’s a wall in the middle of the book, and a young knight is sure that the wall protects his side of the book from the dangers of the other side. Dangers such as an angry tiger and giant rhino, and worst of all an ogre who would gobble him up in a second! But the knight doesn’t seem to to notice the crocodile and the growing sea of water that are emerging on his side. When the water’s almost over his head and he’s calling for help, who will come to his rescue?